多孔连续梁预应力钢绞线伸长量的精确计算

摘要

预应力混凝土技术已应用于工程建设的各个层面,在桥梁施工过程中预应力技术的应用尤为广泛.作为施加预应力的控制指标之一,计算钢绞线的理论伸长量是一项非常重要的技术工作.本文中笔者结合自身的施工经验,将平面测量学的计算原理引入预应力计算,对《公路桥涵施工技术规范》和《路桥施工计算手册》中有关预应力后张法施工的计算加以引申后归纳出一套比较精确、完备的计算方法.%Prestressed concrete technology has been applied in engineering construction in each level,in the bridge construction process,prestressed technology is widely applied.As one of the prestress control targets,calculation theory of steel elongation is a very important technical work.In this paper,the author combines with own construction experience,the calculation principles of the plane surveying is introduced in prestressed calculation,and induces a relatively accurate and complete calculation method after extending the calculation of prestressed post tensioning construction in Highway Bridge Technical Specifications for Construction and The Road &Bridge Construction Calculation Manual